All Icons within this folder belong to the RRZE Icon Set which is based on Tango Both are published CC by SA and where included into mailman with special permission of Franziska Sponsel - one of the designers. Please see http://rrze-icon-set.berlios.de/team.html for the full team And http://tango.freedesktop.org/Tango_Desktop_Project for the Tango Project.